"From this earthly city issue the enemies against whom the City of God must be defended. Some of them, it is true, abjure their worldly error and become worthy members in God's City. But many others, alas, break out in blazing hatred against it and are utterly ungrateful, notwithstanding its Redeemer's signal gifts. For, they would no longer have a voice to raise against it, had not its sanctuaries given them asylum as they fled before the invaders' swords, and made it possible for them to save the life of which they are so proud."
Augustine, The City of God, Garden City: Image Books, 1962, p. 40.